326 SANITARY ENTOMOLOGY 



30 minutes exposure, 4 ounces sodium cyanide per 100 cubic feet 

 (Lamson), 



2. For loosely-hung clothes, 20-inch vacuum, 30 minutes exposure, 

 3 ounces cyanide per 100 cubic feet (Lamson). 



2. The hydrocyanic acid gas (DANGEROUS) is generated in an 

 air-tight generator, which is connected by a pipe with the fumigation 

 chamber, by combining 21/) parts of sodium cyanide solution (made by 

 dissolving -1 lbs, of sodium cyanide, guaranteed to contain 51 per cent, 

 cyanogen, in 1 gallon of water), 1 part of commercial sulphuric acid 

 (184 sp. gr., or 66° Baume) and 1 part of water. 



Create 25-inch vacuum. Generate gas 5 minutes in generator. Wash 

 over into fumigation chamber. Break vacuum so as to fumigate in 

 normal atmospheric pressure 25 minutes. Remove gas by producing 

 25-inch vacuum. Return to normal pressure. Open door slightly and run 

 vacuum pump a few minutes. Remove material. (Sasscer.) (See Fed. 

 Hort. Bd., Service and Reg. Announcement 21, Dec. 4, 1915.) ONLY 

 EXPERIENCED MEN CAN BE PERMITTED TO HANDLE. In 

 case of asphyxiation from cyanide it is imperative to walk the patient 

 up and down in the open air or to resort to artificial respiration. Few 

 fatalities result under such treatment. 



For fumigation in boxes the following gases are available : 



a. Chlorpicrin in galvanized cans using 4 cc. to 1 cu. ft. for 30 

 minutes and applying a little heat. DANGEROUS GAS. (Moore.) 



b. Carbon bisulphide is an inflammable but efficient fumigant but 

 too slow for most army purposes. Place garments in any kind of 

 tight box and pour in the liquid at the rate of 1 lb. to 1000 cu. ft. 

 of space. Leave for 24 hours. 



6. Storage 



Storage of infested garments, dry at 54^-68° F. (12°-20° C), for 

 two or three weeks is effective. Bedding and clothing may be put away 

 in naphthalene crystals or moth balls. 



7. Impromptu Delousing Arrangements 



Under temporary conditions none of the above-mentioned methods 

 can be used to cleanse the garments and in such cases hot water washing 

 or the use of other expedients is necessary. The outer clothing should 

 be ironed and brushed at least once a week. 



A great number of remedies have been suggested and tried, but from 

 these we may select a few which appear to be especially good. There 

 probably will be times when one or another will be more practicable. 



